- Raise the car on a lift so that the wheels hang freely in the air.
- Disconnect the cable from the negative terminal of the battery.
- Remove the right front wheel, the plastic mud guard protecting the engine and the right front wheel
- Set the piston of the first cylinder to TDC, and the mark on the camshaft pulley will be visible through the window of the timing belt casing.
- Special key Mot. 1383 disconnect the high pressure pipes.
- Remove the plug at the rear end of the high pressure distribution pump.
- Instead of the plug at the end of the high-pressure fuel pump, install a dial gauge with adapter Mot. 856, making sure that the indicator measuring head has at least 1 mm of travel in each direction.
- With the Mot. 1318 or a steel rod with a diameter of 7 mm, block the crankshaft by inserting the device into the hole closed with a plug and located on the cylinder block between the flywheel and the oil filter (rice. 3.4).
- In this position, check the lift value of the high pressure fuel pump distributor piston.
- If the value is incorrect, it is necessary to adjust the injection timing of the high pressure fuel pump.
- On vehicles with an air conditioning system, remove the air conditioning compressor pipe bracket from the fuel filter bracket.
- Remove the fuel filter and booster pump.
- Remove the three filter bracket mounting bolts.
- On vehicles with an air conditioning system, remove the upper accessory drive belt guard.
- Remove the high pressure fuel pump pulley housing.
- Install tool Mot. 1317, fixing the fuel pump pulley.
- Loosen the three bolts securing the fuel pump pulley to the bushing, then turn the bushing using the central nut until the required value is obtained on the dial indicator and tighten the bolts to the required torque
- Rotate the engine crankshaft two full turns and check the injection timing of the fuel pump
- Remove the dial indicator and screw the plug into place
- Using a special wrench Mot 1383, thread the high pressure pipes
- Torque tighten the three bolts securing the fuel pump pulley to the bushing.
- Remove high pressure pump pulley support tool Mot 1317
- Install the fuel pump pulley housing
- On vehicles with air conditioning, install the upper accessory drive belt guard.
- Install the fuel filter bracket.
- Install the fuel filter and booster pump, while replacing the copper seals of the pipeline connections
- On vehicles with an air conditioning system, install the air conditioning compressor pipe bracket onto the fuel filter bracket.
- Remove air from the fuel system.
- Connect the wire to the negative terminal of the battery.
- Install the plastic mudguard to protect the engine and the right front wheel and the right front wheel
- Lower the car.
Pic. 3.10. Using a dial indicator to set the position of the fuel pump distributor piston in relation to the TDC of the piston of the 1st cylinder
Pic. 3.11. High pressure fuel pump (engine G8T 716): 1 - solenoid valve for adjusting injection timing advance (KSB); 2 - solenoid control valve depending on the load (ALFB); 3 - load potentiometer; 4 - electronic block of the locking solenoid valve; 5 - deceleration shock absorber; 6 - screw for adjusting the maximum crankshaft rotation speed; 7 - air charge capacity corrector; 8 - vacuum pipe; 9 - fuel pipe; 10 - fuel return pipe; A - «weight» load potentiometer power supply; B - load lever signal; C - load potentiometer power supply (5 V); D - blocking line; E - 12 V APC power supply; F- «weight»; G - load dependent solenoid valve (ALFB); H - solenoid valve for adjusting injection timing advance (KSB); I - not used